Yellow Chub

Xanthism (also known as xanthochroism or xanthochromism) is an unusual colour variety in which the 'normal' colouration of an animal is largely replaced by yellow pigments. It is thought to be genetic but may also be related to diet. Learn more on the Wikipedia page.
The image shows a xanthic Bermuda Chub, Kyphosus sectatrix*, speared by Vin Rushworth (right image, taken at Lord Howe Island) on a southern Abrolhos shoal, Western Australia, in approximately 18m of water. Vin stated, "There were actually 2 xanthic specimens in a school of 30+ fish."
Xanthism has been previously documented in Kyphosus, along with many species of fishes, as well as other animals including amphibians and birds. Visit the Australian Museum's Xanthic Luderick page to view other examples of xanthic fishes.
*The fish was identified by Kyphosus expert Kendall Clements. It is better known in Australia as a Beaked Chub rather than a Bermuda Chub. In Australia, the species is known from the east coast. This fish may represent a range extension.
Posted by markmcg markmcg, July 26, 2018 07:08


Great post, I learned a lot. Thanks Mark.

Posted by harryrosenthal over 3 years ago (Flag)

Thanks Harry. I keep looking for the 'Like' button - iNaturalist needs one. :)

Posted by markmcg over 3 years ago (Flag)

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